body {
    -webkit-user-select: none;
  }
  
  .sloth {
      margin: 0 auto;
      width: 247px;
      height: 194px;
      background: url(../images/sloth.png) no-repeat;
      background-size: 400%;
      /* background-position-y: */
  }
  
  .info {
      margin: 0 auto;
      width: 247px;
      height: 30px;
      line-height: 30px;
      font-size: 16px;
      text-indent: .5em;
      color: #fff;
      background: rgba(0, 0, 0, 0.8);
  }
  
  .btn_wrap {
      position: relative;
      margin: 15px auto 0;
      width: 246px;
      height: 246px;
      border: 1px solid #ECECEC;
      -webkit-box-sizing: border-box;
      -webkit-border-radius: 50%;
  }
  
  .btn_mask, .force_btn {
      position: absolute;
      top: 50%;
      left: 50%;
      width: 146px;
      height: 146px;
      margin-left: -73px;
      margin-top: -73px;
      -webkit-box-sizing: border-box;
      -webkit-border-radius:50%;
  }
  
  .btn_mask {
      background: rgba(51, 122, 183, 0.5);
  }
  
  .force_btn {
      padding: 0;
      background: #337ab7 url() no-repeat center center;
      background-size: 80px;
  }
  